K&H Pet Products Orthopedic Bolster Sleeper with 3” medical grade orthopedic foam. Bolster is filled with Polyfil made from recycled plastic bottles. Removable cover and machine washable. One year warranty. I don’t typically recommend products made in China. This one is decent for the price. I’ve had two and my neighbor also has one for his dog.
You can always add a better orthopedic foam to the bed yourself, or add more.